單項選擇題

The exhaust ports of a diesel engine using the cross-flow scavenging method are opened and closed by the （）

A.reciprocating motion of exhaust valves
B.rotary motion of the camshaft
C.reciprocating motion of the piston
D.developed differential

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單項選擇題

When fuel enters the crankcase of a diesel engine, it （）

A.dilutes the lube oil and reduces its viscosity
B.forms sulfuric acid in the lube oil
C.causes pitting and failure of the bearings
D.causes sludge deposits on valve stems

單項選擇題

In the construction of a diesel engine, what is the purpose of end plates?（）

A.To provide accessibility to the cylinder liners
B.To add stability to the engine block
C.To add rigidity to the block and a surface for attaching other parts
D.To make a surface for the base

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The exhaust ports of a diesel engine using the cross-flow scavenging method are opened and closed by the （）

你可能感興趣的試題

When fuel enters the crankcase of a diesel engine, it （）

In the construction of a diesel engine, what is the purpose of end plates?（）

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